Quantitative Nature of Traits in Genetics

In agriculture, animal husbandry, and humans, traits are quantitative in nature, determined by varying degrees of more or less rather than a binary outcome. Initially ignored, R.A. Fisher's 1918 paper connected Mendel's genetic principles to quantitative traits, highlighting that multiple genes can influence a trait, leading to a normal distribution. Modern DNA analysis has further confirmed Fisher's assertion, emphasizing the extensive influence of multiple genes on quantitative traits.